Bray 92, 93 FLO User Manual
SERIES 92/93
PNEUMATIC ACTUATOR
OPERATION AND MAINTENANCE MANUAL
Ta b l e o f Co n T e n T s
Sa f e t y In f o r m a t I o n - De f I n I t I o n o f te r m S ............................................................................................. 1
De S c r I p t I o n o f op e r a t I o n .......................................................................................................................... 2
p e r a t I n g me D I u m ................................................................................................................................................. 2
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n S t a l l a t I o n ........................................................................................................................................................... 2
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o u n t I n g ac t u a t o r t o t h e Va l V e ................................................................................................................ 4
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e t t I n g t h e tr a V e l St o p S .............................................................................................................................. 4
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a I n t e n a n c e .......................................................................................................................................................... 5
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r o u b l e S h o o t I n g .................................................................................................................................................... 6
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S S e m b l y ................................................................................................................................................................ 6
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I S a S S e m b l y ............................................................................................................................................................ 7
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D D I n g Sp r I n g ca r t r I D g e S ..................................................................................................................................... 8
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p r I n g ca r t r I D g e po S I t I o n Il l u S t r a t I o n ....................................................................................................... 8
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e m o V I n g Sp r I n g ca r t r I D g e S ........................................................................................................................ 9
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e n e r a l pn e u m a t I c Sy S t e m re c o m m e n D a t I o n S .................................................................................................... 10
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I m e n S I o n a l Da t a ................................................................................................................................................. 10
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e r I e S 92/93 pa r t S DI a g r a m ................................................................................................................................. 11
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Operations and Maintenance Instructions
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sa f e T y In f o r m a T I o n - De f I n I T I o n o f Te r m s
WARNING indicates a potentially hazardous situation which, if not avoided, could
result in death or serious injury.
CAUTION indicates a potentially hazardous situation which, if not avoided, may
result in minor or moderate injury.
NOTICE used without the safety alert symbol indicates a potential situation which,
if not avoided, may result in an undesirable result or state, including
property damage.
Series 92-93 Pneumatic Actuator
Hazard-free use
This device left the factory in proper condition to
be safely installed and operated in a hazard-free
manner. The notes and warnings in this document
must be observed by the user if this safe condition
is to be maintained and hazard-free operation of
the device assured.
Take all necessary precautions to prevent damage
to the actuator due to rough handling, impact, or
improper storage. Do not use abrasive compounds
to clean the actuator, or scrape metal surfaces with
any objects.
The control systems in which the actuator is installed
must have proper safeguards to prevent injury to
personnel, or damage to equipment, should failure
of system components occur.
Qualified Personnel
A qualied person in terms of this document is
one who is familiar with the installation, commissioning and operation of the device and who has
appropriate qualications, such as:
Is trained in the operation and maintenance of •
pneumatic equipment and systems in accordance with established safety practices
Is trained or authorized to energize, de-energize, •
ground, tag and lock electrical and pneumatic
circuits and equipment in accordance with
established safety practices
Is trained in the proper use and care of personal •
protective equipment (PPE) in accordance with
established safety practices
Is trained in rst aid•
In cases where the device is installed in a •
potentially explosive (hazardous) location –
is trained in the operation, commissioning,
operation and maintenance of equipment in
hazardous locations
WARNING
The actuator must only be installed, commissioned,
operated and repaired by qualied personnel.
The device generates large mechanical force when
pressurized with air, and/or powered by springs.
The actuator stores a large amount of energy when
pressurized with air, and/or when the springs are
compressed.
To prevent injury, installation, commissioning,
operation and maintenance must be carried out
under strict observation of the safety regulations.
Reference is specically made here to observe the
applicable safety regulations for actuators installed
in potentially explosive (hazardous) locations.
All information herein is proprietary and condential and may not be copied or reproduced without the expressed written consent of BRAY INTERNATIONAL, Inc.
The technical data herein is for general information only. Product suitability should be based solely upon customer’s detailed knowledge and experience with their application.
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Series 92-93 Pneumatic Actuator
Operations and Maintenance Instructions
Correct and safe operation of this actuator is dependent upon proper transport, storage and installation
in addition to proper operation and maintenance.
Description of Operation
The Flow-Tek Series 92/93 Pneumatic Actuators
feature a double piston, rack and pinion mechanism
designed to automate quarter-turn valves. In the
Series 92 Double-Acting Actuator, pressure introduced through Port A (the left port when facing
the ports) forces the pistons away from each other
and causes the pinion to rotate in a counterclockwise direction. Pressure introduced through Port
B (the right port when facing the ports) is directed
through an internal passage to the opposite side
of the pistons, which forces the pistons together
and rotates the pinion in a clockwise direction.
Normally, the clockwise rotation (pistons moving
together) closes the attached valve, and the counterclockwise rotation (pistons moving apart) opens
the attached valve.
In the Series 93 Spring-Return Actuators, spring cartridges have been added to push the pistons together
by spring force in the event the compressed air pressure is lost. This spring force normally closes the
attached valve. However, in the event that the valve
is required to open under spring force, refer to the fail
open portion of the Installation section below.
Operating Medium
NOTICE
Operating Temperature
NOTICE
The recommended operating temperature range
is -15°F to 200°F (-25°C to 95°C). Below 32°F
(0°C) care must be taken to prevent condensed
moisture from freezing in the air supply lines.
Consider the use of an air dryer if the device is
installed in a cold location. The air dryer must
be capable of lowering the dew point of the air to
a temperature 36°F (20 °C) lower than that of the
surrounding environment. The air dryer must be
properly maintained and kept in operation.
Installation
Flow-Tek Series 92/93 Actuators are designed
to Flow-Tek Valves through a series of heavy
duty brackets and couplers. Before the actuator
is mounted on a valve, it is a good practice to
lubricate the output bore of the actuator with thick
grease. The grease will make it easier to remove
the actuator from the mounting coupler, even after
years of service.
Normally, the actuator is mounted with its long side
parallel to the pipeline. A double acting actuator will
normally rotate the valve stem clockwise to close,
and counterclockwise to open. Spring return actuators will normally rotate the valve stem clockwise to
close with the spring stroke, and counterclockwise
to open with the air stroke. The normal operation
of the spring cartridges is therefore fail closed.
The recommended operating medium is clean, dry
industrial compressed air, 40 - 140 psig (3 - 10
bar.) An air line lubricator is suggested for fast
cycling applications, i.e. more than 10 cycles per
minute. Other media such as hydraulic oil, water,
or certain other inert gases may also be used in
some instances, but the factory should be consulted
for specic applications.
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All information herein is proprietary and condential and may not be copied or reproduced without the expressed written consent of BRAY INTERNATIONAL, Inc.
The technical data herein is for general information only. Product suitability should be based solely upon customer’s detailed knowledge and experience with their application.
Direction of operation may be changed to fail open
by any one of several different methods. Refer to
the Assembly Instructions and Exploded View in
Figure 3 on page 12 for more details.
Fail Open Method 1 – Mounting the Actuator
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Perpendicular to the Pipeline
Series 92-93 Pneumatic Actuator
Operations and Maintenance Instructions
WARNING
NOTICE
Fail Open Method 1 – Mounting the Actuator
Perpendicular to the Pipeline – works only with
valves that allow the ball to be swung through
the seat.
Turn the actuator so the long side is perpendicular
to the pipeline. This will allow the spring cartridges
to rotate the valve stem clockwise to open, and the
air stroke to rotate the valve stem counterclockwise
to close. This is the easiest method if there is sufcient room to mount the actuator.
Fail Open Method 2 – Rotating the Pinion
NOTICE
Fail Open Method 2 – Rotating the Pinion - works
only with valves that allow the ball to be swung
through the seat.
Some actuators may have spring cartridges installed.
Before disassembly, all spring cartridges must be
placed into the relaxed (fully extended) position.
All compressed air must be removed from inside
the actuator (See warning above) and the actuator
pinion must be allowed to rotate so the springs may
be relaxed. Care must be taken to verify that any
device connected to the actuator, such as a valve
mounted underneath, is not preventing the movement of the springs to the relaxed position.
Remove the end caps, spring cartridges and pistons
from the actuator. Remove the pinion, rotate it
90°, and reinstall the pinion in the actuator. This
will also allow the spring cartridges to rotate the
valve stem clockwise to open, and the air stroke to
rotate the valve stem counter-clockwise to close.
This is the second easiest method, and allows the
actuator to be mounted with its long side parallel
to the pipeline.
Fail Open Method 3 – Reversing the Pistons
See Assembly (Page 6) for detailed instructions on
reinstalling the travel stop cam on the pinion.
Fail Open Method 3 – Reversing the Pistons –
works for all valves, where the ball may only turn
WARNING
Before disassembly of the actuator, the pneumatic
air supply must be completely disconnected from
the actuator, and all compressed air stored within
the actuator must be released. Auxiliary devices
connected to the actuator, such as tubing, ball
valves, solenoid air valves, valve positioners, etc.
can block the release of air from within the actuator.
Do not rely upon the features or controls of any
auxiliary device to release the air from inside the
actuator and render it safe for disassembly.
All information herein is proprietary and condential and may not be copied or reproduced without the expressed written consent of BRAY INTERNATIONAL, Inc.
The technical data herein is for general information only. Product suitability should be based solely upon customer’s detailed knowledge and experience with their application.
clockwise to close.
See Assembly (Page 6) for detailed instructions on
reinstalling the travel stop cam on the pinion.
Remove the end caps, spring cartridges and pistons
from the actuator. Rotate the pistons so that the racks
turn the pinion counterclockwise as the pistons move
toward each other. (With the air input ports of the
actuator body facing you, the left hand piston rack
should be on the side with the air ports.) This is the
third easiest method, and allows the actuator to be
mounted with its long side parallel to the pipeline,
and clockwise to close rotation to be maintained.
NOTICE
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